Question

我对Android很新，我想改变（我知道如何动态设置它......）Textview在一段时间后动态地运行，但在此期间保持文本发布，除非用户更改或者如果我的计划已达到某一天。

基本上我有用户输入日期然后我希望我的程序计算天数，只要用户和我的程序介入textview它将显示相同的文本和背景颜色，直到相反的行动

这是我的代码：

 String CurrentDate = new SimpleDateFormat("dd/MM/yyyy").format(new Date());
    String FinalDate = TvDateOfService.getText().toString();
    SimpleDateFormat dates = new SimpleDateFormat("dd/MM/yyyy");
    Date dateinput;
    Date datetwra;
    //Setting dates
    try {
        dateinput = dates.parse(FinalDate);
        datetwra = dates.parse(CurrentDate);


        //Comparing dates
        long difference = Math.abs(dateinput.getTime() - datetwra.getTime());
        long differenceDates = difference / (24 * 60 * 60 * 1000);

        //Convert long to String
        String dayDifference = Long.toString(differenceDates);

        //Calendar Instance to Add 89 Days for Service Period Between Dates!!
        Calendar cal1 = Calendar.getInstance();
        cal1.add(Calendar.DATE, 90);
        Date ServicePeriod = cal1.getTime();

        Calendar cal2 = Calendar.getInstance();
        cal2.add(Calendar.DATE, 80);
        Date DaysBeforeEnd = cal2.getTime();

        do {
            tvStatus.setBackground(getApplicationContext().getResources().getDrawable(R.drawable.textview_backround_green));

        }while (dateinput.before(DaysBeforeEnd));

        do {
            tvStatus.setText("something");
            tvStatus.setBackground(getApplicationContext().getResources().getDrawable(R.drawable.textview_backround_yellow));
        }while (dateinput.after(DaysBeforeEnd));

        do {
            tvStatus.setText("something else");
            tvStatus.setBackground(getApplicationContext().getResources().getDrawable(R.drawable.textview_backround_red));
        }while (dateinput.after(ServicePeriod));

Answer 1

看起来您正在尝试使用for循环并等待一定天数 - 如果您使用AlarmManager，这对手机的电池最有利

https://developer.android.com/trai.../scheduling/alarms.html

在一段时间后动态更改Textview

1 个答案: